repeating jquery error

I am getting a repeating typerror in my console log with firebug. It is says the d.css is not a function within the global.js file.

I think this is a conflict with another app i am running called arrowchat, cause once i remove that from loading in my header the error goes away. Possibly arrowchat is loading another version of jquery I am not sure.

Let me know if this something that you can help me with.